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0000183

VTK

(No Category)

public

2003-09-22 19:01

2004-01-21 19:32

Reporter

Clinton Stimpson

Assigned To

Mathieu Malaterre

Priority

normal

Severity

minor

Reproducibility

always

Status

closed

Resolution

fixed

Platform

OS Version

Product Version

Target Version

Fixed in Version

Summary

0000183: vtkPolygon::IntersectWithLine tolerance problem

Description

Can't intersect with polygons within a tolerance.
If the intersection was within the polygon, it works fine.

In vtkPolygon::IntersectWithLine(...)
there is a
if( EvaluatePosition(...) )
{ ... }

If I compare that to vtkTriangle's it is a bit different.

It should be
if( EvaluatePosition(...) >= 0 )
{ ... }
so if '0' is returned, we can still check if it
is within tolerance and say the ray intersected.

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Notes
(0000545) Mathieu Malaterre (developer) 2004-01-21 19:03	Already fixed in CVS: http://vtk.org/cgi-bin/cvsweb.cgi/VTK/Common/vtkPolygon.cxx.diff?r1=1.99&r2=1.100 [^] Do we need to merge this in VTK 4.2 branch ?

(0000547) Clinton Stimpson (developer) 2004-01-21 19:24	That would be wonderful if it was put in the 4.2 branch. I keep patching 4.2 code I download and build for different platforms because it is a big deal in my app.

(0000550) Mathieu Malaterre (developer) 2004-01-21 19:32	Ken, do I need to merge this in VTK 4.2 branch ?

Issue History
Date Modified	Username	Field	Change
2011-06-16 13:11	Zack Galbreath	Category	=> (No Category)